How do I tell what year my 6.0 engine is?

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Originally Posted by Quik

99-00 6.0s that iron block have iron heads
01-07 6.0s regardless of LQ9 or LQ4 have 317s heads

97-03 motors rather it be 4.8,5.3,5.7,6.0 all have the long/short style head bolts

04+ 4.8,5.3,6.0 have the same size head bolts

04+ later lQ4 and LQ9 are same motors in and out besides the slight dish of a piston

i think all the vans had Cable TB

the year motor isnt going to make one bit of difference in power


now 07+ 6.0 aluminum have the L92 heads which is also based off a GenIV

02+ of 4.8,5.3,5.7,6.0 have MLS gaskets

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are you sure about the 04+ ? When i was at GM getting head bolts, they said 05+ is same size not 04 but idk

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Originally Posted by Quik

yes since my 408 is a 04 LQ9 block and it uses the same size head studs unlike my 03 LQ9 6.0 was

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Weird. Thanks for the info

Oh, I am not doubting you at all Quik. I just wanted to include the link where I got my info from. And considering it was from LS1Tech, I thought it was reliable...

Ricky--I thought the dealer said it was only 03 that were different...as in different head bolt sizes for the 03 and 04 and up had the same head bolt size... same as the 5.3L and 4.8L...

Thanks for the help guys. It has 317 heads and I'm going to boroscope the cylinders to see how it looks in there. Also the engine has no EGR so it has to be newer than '04 right?

Yeah, a boroscope will let you look in there and see your piston heads. Or, like I said previously, it would be a good idea to break that motor down to clean and inspect it---and then once the heads are off look at the piston heads then. I am serious man, the intake and combustion chambers will be pretty dirty and gummed up from the oil vapor recirculation system.

I think the EGR was stopped on the 02 models. The 2003-2007 Classic did not have EGR. Can someone confirm this?

Tyler, who knows I forget by now. I have new things on my mind :lol: :burnrub:

You left that completely open for me to rip you a new one, but since we have so many whiny bitches, I am going to refrain from making some 100% hilarious comments...

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Originally Posted by txarkitekt

You left that completely open for me to rip you a new one, but since we have so many whiny bitches, I am going to refrain from making some 100% hilarious comments...

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PM SENT TO MOD lol jk rip it to me :sadnana:

Everything i found says 02 and older tyler so you're probably right.